:Multi-Point Calibration (up to 5 points) with Auto-Buffer Recognition - choice of USA, NIST or pure water buffer standards with 0.01 pH accuracy ::Automatic Temperature Compensation (ATC) for the highest accuracy under fluctuating temperatures ::Hold Function momentarily freezes reading for easy viewing and recording ::Auto-Power Off saves battery power after non-use ::Self-Diagnostic with message codes for easy troubleshooting ::Large Custom LCD provides optimum viewing even at a distance 1f- METER ONLY, NO PROBE- Used item, it is sold as pictured, please STUDY MY ACTUAL PICTURES of this item to see what?s included with this sale and its overall condition. Do your research before buying to be sure it's what you need, there is a restocking fee for my items. If you have any questions, please contact me BEFORE buying. Pay attention to the posted estimated delivery time, all my items are shipped USPS SIGNATURE REQUIRED UPON DELIVERY for security. Please buy accordingly, Thanks Additional Details ------------------------------ Product description: :Multi-Point Calibration (up to 5 points) with Auto-Buffer Recognition - choice of USA, NIST or pure water buffer standards with 0.01 pH accuracy ::Automatic Temperature Compensation (ATC) for the highest accuracy under fluctuating temperatures ::Hold Function momentarily freezes reading for easy viewing and recording ::Auto-Power Off saves battery power after non-use ::Self-Diagnostic with message codes for easy troubleshooting ::Large Custom LCD provides optimum viewing even at a distance